The PetSafe Extreme Weather Pet Door, offers independence and freedom whilst providing owners with the ultimate in Weather Proofing. Protecting your home from the elements, the soft fabric insulating Flap and dual PVC Flaps ensure a Weather Resistant Seal around the opening, keeping the cool or warm air inside your home. For additional Weather Resistance and for Pet parents that wish to control the wanderings of their furry friends a plastic Closing Panel can be purchased that simply clips into place. Installing the Extreme Weather Pet Door is made quick and easy with the Installation Guide and cutting template, helping you to achieve the ideal fit for your home. Important information The PetSafe Extreme Weather Pet Door is not suitable for glass fitting Small For Pets up to 7 kg Frame dimensions: 284 mm x 214 mm Flap size: 205 mm x 130 mm Cut out size for walls thinner than 54 mm: 258 mm x 165 Cut out size for walls thicker than 54 mm: 258 mm x 142 mm Medium For Pets up to 18 kg Frame Dimensions: 384 mm x 291 mm Flap Size: 300 mm x 200 mm Cut out size for walls thinner than 54 mm: 360 mm x 241 mm Cut out size for walls thicker than 54 mm: 360 mm x 216 mm Large For Pets up to 45 kg Frame dimensions: 508 mm x 341 mm Flap Size: 413 mm x 259 mm Cut out size for walls thinner than 54 mm: 489 mm x 292 mm Cut out size for walls thicker than 54 mm: 464 mm x 269 mm Whats in the box 1 x PetSafe Extreme Weather Pet Door 1 x Cutting Template 1 x Installation Guide 1 x pack of Nylon screws 1 x snap on cover If you have any questions please contact the PetSafe customer service team on 0. PetSafe Extreme Weather Energy Efficient Pet Door, White, Medium - 3 FLAP SYSTEM ? Featuring a revolutionary 3 Flap System, the Extreme Weather Pet Door maintains the climate of your home with the unique insulating centre flap (U-Value = 1.1924 W/ M 2 ?C) - ENERGY EFFICIENT ? Ensuring a robust, weather tight seal, the Extreme Weather Pet Door boasts being 3.5 times more Energy Efficient than a traditional Cat Flap thanks to the dual PVC Flaps and the centre Insulating fabric flap - SNAP-ON CLOSING PANEL - Allows you to keep your pet from using the pet door; use a second closing panel (sold separately) on the outside for an additional layer of weather protection - EASY INSTALL - With the help of the simple Installation guide and cutting template a precise fit can be achieved quickly and easily, this pet door fits most doors 4.1 \- 5.7cm thick - WARRANTY ? The PetSafe Staywell Extreme Weather Pet Door includes a 3 year manufacturer?s Warranty